公开(公告)号：EP0589721A1

公开(公告)日：1994-03-30

申请号：EP93307596.2

申请日：1993-09-24

申请人： SAMSUNG ELECTRONICS CO. LTD.

发明人： Park, Wung-wook ,  Paik, Joon-ki

IPC分类号： H04N5/262 ,  H04N9/74

CPC分类号： H04N9/74 ,  G06T3/4007 ,  G06T3/403 ,  H04N5/2628 ,  H04N9/045 ,  H04N2209/041 ,  H04N2209/046

摘要： A digital zooming system comprises field memories (6) for saving a digital video signal forming a predetermined colour array; a sum/difference signal separator (5) for receiving the signal from the recording medium and then obtaining a sum value and difference value with respect to two neighbouring pixels among the pixels of the predetermined colour array; a correlation calculating circuit comprising a sum-value interpolation calculator (7 and 8) for performing horizontal and vertical interpolations with respect to the sum-value according to a zooming ratio and a difference-value interpolation calculator (9 and 10) for calculating the horizontal and vertical interpolations and a digital low pass filter to compensate for edge degradation; a sum/difference signal mixer (11) for receiving the interpolated sum value and difference value and producing the original digital video signal; a digital-to-analog converter (12) for converting the digital video signal from the mixer into analog form; an address generator (13) for generating an address signal for reading or writing the data recorded on the recording medium; a coefficient generator (14) for inputting coefficients conforming to the zooming ratio to the sum-value and difference-value interpolation calculators; and a control-signal generator (15) for generating a control signal for controlling each of the aforementioned elements. Hence, the system can be applied for a variety of magnifying factors and a high quality digital picture zoom can be accomplished.

摘要翻译： 数字变焦系统包括用于保存形成预定颜色阵列的数字视频信号的场存储器（6） 和/差信号分离器（5），用于从记录介质接收信号，然后获得相对于预定颜色阵列的像素中的两个相邻像素的和值和差值; 相关计算电路，包括用于根据变焦比相对于和值执行水平和垂直内插的和值内插计算器（7和8）和用于计算水平的差值内插计算器（9和10） 和垂直内插和数字低通滤波器来补偿边缘劣化; 用于接收内插和值和差值并产生原始数字视频信号的和/差信号混合器（11）; 用于将来自混频器的数字视频信号转换成模拟形式的数模转换器（12）; 地址发生器（13），用于产生用于读取或写入记录在记录介质上的数据的地址信号; 系数发生器（14），用于将符合变焦比的系数输入到和值和差值插值计算器; 以及控制信号发生器（15），用于产生用于控制上述每个元件的控制信号。 因此，该系统可以应用于各种放大因子，并且可以实现高质量的数字图像变焦。